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The perturbative proton form factor reexamined
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The perturbative proton form factor reexamined
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We recalculate the proton Dirac form factor based on the perturbative QCD factorization theorem which includes Sudakov suppression. The evolution scale of the proton wave functions and the infrared cutoffs for the Sudakov resummation are carefully chosen, such that the soft divergences from large coupling constants are diminished and perturbative QCD predictions are stablized. We find that the King-Sachrajda model for the proton wave function leads to results which are in better agreement with experimental data compared to the Chernyak-Zhitnitsky wave function.
Forward citations
Cited by 2 Pith papers
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Revisiting $\bar B^0 \rightarrow \Lambda_c^+ \bar p$ decay with higher twist corrections
Higher-twist LCDAs plus W-exchange produce destructive interference that lowers the PQCD branching fraction of B-bar0 to Lambda_c+ p-bar to ~1.6e-5, matching experiment, while predicting the suppressed mode at order 10^{-8}.
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Investigation of $\Lambda_{b}\to \Lambda_{c} \ell^-\overline\nu_\ell$ Decays in Perturbative QCD Approach
A leading-order pQCD calculation of all six Lambda_b to Lambda_c form factors, z-expanded and anchored to a lattice QCD point, predicts R_Lambda_c = 0.29+0.12-0.11, slightly above LHCb.
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